{ "self": "urn:mrn:signalk:uuid:b7590868-1d62-47d9-989c-32321b349fb9",
  "vessels": {
    "urn:mrn:signalk:uuid:b7590868-1d62-47d9-989c-32321b349fb9": {
      "uuid": "urn:mrn:signalk:uuid:c0d79334-4e25-4245-8892-54e8ccc8021d",
		    "environment": {
		        "depth": {
		            "belowKeel": {
		                "value": 3.4,
		                "timestamp": "2015-03-06T16:57:53.643Z",
		                "$source": "nmea1.II",
		                "_attr": {
		                    "_mode": 644,
		                    "_owner": "self",
		                    "_group": "self"
		                },
		                "meta": {
		                    "description": "Depth below keel",
		                    "displayName": "Depth Below Keel",
		                    "longName": "Depth Below Keel",
		                    "shortName": "DBK",
		                    "units": "Meters (m)",
		                    "warnMethod": ["visual"],
		                    "alarmMethod": ["sound"],
		                    "zones": [
		                        {"lower":0.0,"upper":1.5,"state":"alarm", "message":"Running aground!"},
		                        {"lower":1.5,"upper":3.0,"state":"warn", "message":"Shallow water!"},
		                        {"lower":3.0, "state":"normal"}
		                    ]
		                }
		            }
		        }
		    }
    }
  },
  "version": "1.0.0"
}